Nut-lock.



L. L. $WENSON.

NUT LOOK.

APPLICATION IILED,I'EB.13, 191 1.

Patented Jan. 2, 191 2.

NIT i a'rnr orric NUT-LOCK.

To all whom it may concern."

Be it known that I, LUTHER L. Swanson, a citizen of the United States, residing at Ottumwa, in the county of Vapello and State of Iowa, have invented certain new and useful Improvements in Nut-Locks, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to nut locks and has for its object to provide a simple, effective, durable and extremely inexpensive device of this character whereby the nut may be quickly and securely looked upon the bolt.

A further object of the invention resides in the provision of a nut locking device consisting ofasplit nut provided with threads for engagement with the bolt threads, said lock nut beingadapted for binding engagement upon the face of the nut whereby the threads thereof are caused to bind against the bolt threads, and prevent any-turning movement of the nut upon the bolt.

lVith these and other objects in view, the invention consists of the novel features of construction and the combination and arrangement of parts hereinafter fully described and claimed, and illustrated in the accompanying drawings in which- Figure 1 is a perspective view of a nut lockembodying my improvements show; ing one of the uses to which the device can be put. Fig. 2 is alongitudinal section. Fig. 3 is a side elevation showing the looking nut in its operative position against the face of the nut, and Fig. 4 is a detail perspective view of the locking nut.

Referring in detail tothe drawing, 5 designatesthe threaded bolt and 6 the nut engaged thereon. I

7 indicates the locking nut which is in the form of a ring or annulus split as indicated at 8, and having its abutting ends spread apart or disposed out of alinement as clearly shown in Fig. 4. This nut is provided. with interior threads 9 for engage ment with the threads of the bolt and is of octagonal or any other desired polygonal form so that a wrench may be readily apolied thereto. Normally the interior threads of the locking nut are properly alined atthe ends thereof, so that said nutmay be'easily and quickly threaded upon the bolt shank. After the nut 6 has been Specification of Letters Patent.

Application filed February 13, 1911.

Patented Jan. 2,1912,

Serial No. 608,300, 1

threaded upon the shank into engagement with the object through which the bolt is disposed, the locking nut is then adjusted and forced into binding engagement against the outer face of the nut. The wrench is now applied to the nut 7 and the same is turned upon the bolt, such turning move ment forcing the separated ends of the locking nut into alinement and spreading the threads thereof so that they bind closely against the threads of the bolt shank, and

- thus absolutely prevent any turning movement of the nut 6 whereby the parts held by the bolt would be loosened.

In Fig. 1 of the drawings I have shown an application of the device wherein the bolt is disposed through the web of a rail and the fish plates thereof, but it will be obvious that my improved locking device may be used in all instances where a reliable and securelock for the nut is desired. The locking nut 15 twisted to a suflicient extent before the threads are provided therein,

1 so as to insure the desired binding action of the threads thereof with the bolt threads, when the nut is adjusted to its locking position.

From the foregoing it is believed that the construct-ion and operation of my improved nut lock will be readily understood. The same is extremely simple and inexpensive to manufacture while at the same time a highlyetlicient and reliable device 'of this character is provided.

The locking nut 7 is preferably formed from hardened steel which is tempered to render the same resilient. Thus when the locking nut is tightened up against theface of the nut 6, it will have a tendency to assume its original shape, thereby causing the threads of the bolt and Washer to bind and securely lock the nut in position on'the bolt.

I claim The combination with a threaded bolt and a nut engaged thereon, of a polygonalshaped split locking nut of spiralform, the opposedend portions of said nut being normally disposed in different planes,'theop posed faces of said separated end portions. of the nut being radially disposed withrespect to the bolt, said nut having interior screw threads, for engagement with the threads ofsaid bolt, the threads of said locking. nut at one of the separated ends thereof engaging threads on the bolt adjacent to those engaged by the other end of tions upon the bolt threads, substantially as 10 the locking nut, said locking nut being and for the purpose specified. adapted to be threaded upon the bolt into In testimony whereof I hereunto afiix my binding engagelgent with the face of the signature in the presence of two witnesses.v bolt nut, the bin in action upon one of the a t separated ends of this locking nut tending to LU r1 HER SWENSON' force said separated ends of the locking nut I Witnesses:

into alinement and binding the threads of H. C. JOHNSO said locking nut at their opposed end .por- K. BAKER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. O. v 

